Sawdust furnace



May 13, 1924. j 1,494,039

A. l. THOMAS SAWDUST FURNACE Filed Nav.Y 22 1923 2 Sheets-sheen 1 I 3mm/sto@ May 13, 1924. 1,494,039

A. l. THOMAS SAWDUST FURNACE Filed Nov. 22 1923 2 Sheets-Sheet 2 I /6 Q I Patented May 13, 1924.

ALONZO IRVEN THOMAS, F EUREKA, CALTFORNTA.

SAWDUST FURNACE.

.Application filed November 22, 1223.

To all whom t may concern Be it known that l, ALONZO if.. THOMAS, a citizen of the United States residing at Eureka, in the county of Humboldt and State of California, have invented certain new and useful Improvements .in Sawdust Furnaces7 of which the following is a specification, reference being had therein to the accompanying dra-wings.

This invention relates to a saw dust furnace of the character of that shown in my Patent No. 1,410,141, issued to me on the 21st day of March, 1922, and it has for its object to provide a construction by virtue of which a furnace will be produced which will have a long life, one in which the parts will not readily burn out and one in which if any of the parts do burn out they may be readily replaced without trouble, delay or expense.

Further objects and advantagmges of the invention will be set forth in the detailed description which follows.

Tn the accompanying drawings:

Fig. 1 is a longitudinal sectional View through a furnace constructed in accordance with the invention;

Fig. 2 is a transverse sectional view therethrough;

Fig. 3 is a horizontal sectional view illustrating the arrangement of the ducts;

Figs. 4 and 5 are detail views illustrating a type of nozzle which may be employed; and

Fig. 6 is a sectional view of a flange adapt ed to receive such nozzles.

Like numerals designate corresponding parts in all of the figures of the drawings.

The furnace of the present invention is particularly designed to burn comminnted wood7 saw dust and the like. This furnace comprises no grate but upon the contrary has a solid bottom of fire brick, indicated at 5 which fire brick is superimposed upon a concrete base 6. The walls of the furnace are indicated at 7 and the saw dust is fed to the furnace at 8. A relative large duct 9 leads through the front wall of the base and connects by means of a vertical Well or bend 10 with a cross-duct 11. This crossduct, in turn, connects with two longitudinally extending outside ducts 12 and 13. A second large duct 14 leads from the front of the furnace to a well 15 which is common to and connects with two longitudinally extending ducts 16 and 17 which lie inwardly of the ducts 12 and 13. All of the longitudinally extending ducts 12, 15I 16 and 17 v place.

Serial No. 576,451..

terminate ush with the face of the concrete base and are open at the upper face of said base. Nozzle receiving sockets 18. such as are illustrated in Fig. 6 are placed in position to span the ducts at suitable intervals after which the tire breil: or other highly refractory material is placed in position. Tt is manifest that when the refractory material 5 is placed in position it anchors the nozzle receiving sockets or bases firmly in Nozzles 19 or 20 having tapered base portions 21 are adapted to be seated in these sockets. They do not have threaded connection therewith but merely have a tapered fit therein so that if these nozzles burn out they may be readily lifted out of place and new nozzles substituted therefor wit-hout disturbing the sockets and without disturbing the refractory material 5. Thus it is manifest that the structure lends itself to ready repair, while the fact that the nozzles are exposed but a short distance and that their lower portions are protected by being located beneath the surface of the refractory material renders the device long lived. The nozzles have lateral openings formed through their sides arranged in staggered relation, as indicated at 21 and these nozzles likewise have openings 22 formed in their tops. Tn making these nozzles I preferably7 leave thin sections of material over the slots which are to constitute the openings of the nozzles, which thin sections may be readily broken out as desired and thus the air capacity of the nozzles may be varied at will.

`Wliile my invention is primarily intended to burn saw dust and the likey it is also use ful in burning coal and all other low grade fuels of a granular or comminuted nature. Furthermore the invention is not limited to the use of any particular material in the construction of this furnace nor to any particular proportions of parts.

Tt is to be understood that the invention includes .within its purview whatever changes fairly come within either the terms or the spirit of the appended claims.

Having described my invention what. T claim is:

1. A furnace of the character described comprising a base having a plurality of longitudinally extending ducts formed therein which open at the upper face of said base, nozzle receiving sockets seated upon said base at intervals along said ducts, re fractory material above said sockets anchoring said sockets in place and nozzles engaged with said sockets.

2. A structure as recited in cla-ini l Wherein the engagement between the nozzles and the sockets constitutes a tapered joint.

8. A grateless furnace of the character described comprising a base ot niasonry having open top ducts longitudinally formed therein7 ducts leading from the eziterioi of said base to said longitudinally extending` ducts for delivering air thereto, nozzle receiving sockets disposed upon the base and spanning said ducts at intervals in the length oI" said ducts., refractory material ALONZO IRVEN THOMAS. 

